Welding gun



FIG. 1 is a perspective view of the welding gun;

FIG. 2 is a side view thereof;

FIG. 3 is a right side view of the gun as depicted in FIG. 2;

FIG. 4 is a top view of the welding gun;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a left side view of the gun depicted in FIG. 2.

The ornamental design for a welding gun, as shown and described.